Intro

Hello, I am Nikos and I currently work as Data Analyst. I am data science enthusiast and love working with all data driven tasks.

My daily activities include manipulating and analyzing data to solve problems, building creative visualizations to gain insights and building machine learning models to predict business outcomes.

I am fan! I enjoy using R for data science and develop data products using R Shiny to automate processes and present findings.

I hold a MSc in Business Analytics from Athens University of Economics and Business and a BSc in Mathematics from University of Athens. I have solid mathematical and programming skills and experience with a variety of relational databases and big data systems.


Experience

05/2017 - Present    Data Analyst, Analytics Department, Intelen Inc, Athens

  • Design, develop and maintain analytics app (R Shiny) for the following purposes: data visualisation, statistical results, simulation, KPI monitoring, customer scoring & segmentation, predictive modelling, etc.
  • Use supervised and unsupervised machine learning methods to optimize customer experience, revenue generation and other business outcomes
  • Enhance customer experience building recommender systems for personalized services
  • Develop and automate reporting processes
  • Define, measure and monitor KPIs
  • Design new data-driven business products

07/2016 - 05/2017   Data Scientist, Credit Risk Department, ICAP Group, Athens

  • Prepare the thesis “Storage of Default Characterization Data”, as part of the M.Sc. in Business Analytics, Athens University of Economics and Business
  • Support regulatory requirements on reporting and monitoring of ICAP’s credit assessment evolution data to regulators
  • Support reporting to European Rating Platform (ERP/RADAR), the platform maintained by ESMA on credit rating agencies data
  • Design, develop and maintain statistical procedures and tools (automated and semi-automated procedures) for the monitoring of credit assessment evolution in SAS and R softwares, as well as, data management and automation activities
  • Business process modelling

01/2015 – 10/2015   Researcher, Telephone Research Department, Metron Analysis S.A., Athens

  • Participate in the conduction of various research projects in the section of the telephone survey department.


Education

10/2015 - 01/2017   M.Sc. in Business Analytics, Athens University of Economics and Business

Degree with Distinction, 8.86 / 10

Field Study Project (Master Thesis) conducted in ICAP Group:
Development of automated system in R for the following activities on default characterization data:

  • Data cleansing, exploration and transformation
  • Statistical reporting and visualization
  • Creation of historical database and integration in optimised data schema

Part of master projects:

  • Data warehousing, Data management, ETL (MySQL, MemSQL, Java, R)
  • Statistical analyses with R using various methods, e.g. regression, classification, clustering, LASSO, PCA, Naïve Bayes, etc.
  • Application development using big data tools like Hadoop, Spark, Redis, MongoDB and Neo4j (Java, Scala, R)
  • Data Mining, Large Scale Optimization, Visual Analytics, Recommender Systems, Business Analysis

10/2008 – 09/2013   B.Sc. in Mathematics, University of Athens

  • Main topics of interest: Probability Theory, Operations Research, Stochastics, Statistics


Technical skills

  • R, Python, Base SAS, Java, Scala, MATLAB
  • Experience with SQL and NoSQL databases including MySQL, PostgreSQL, MemSQL Spark, Hadoop, MongoDB, Cassandra, Redis, Neo4j
  • Familiarity with markup languages including Markdown, HTML, XML
  • Data Mining, BI and Visualization tools: Pentaho, SAS Enterprise Miner, Rapid Miner, Spotfire, IBM Watson
  • Business Modelling tools, e.g. ARIS


Professional development

07/2018 - 08/2018   Data Scientist with Python, Datacamp Career Track

02/2018 - 03/2018   Data Scientist with R, Datacamp Career Track

02/2018 - 04/2018   R Programmer, Datacamp Career Track

02/2018 - 04/2018   Data Analyst with R, Datacamp Career Track

01/2017 - 03/2017   Mastering Software Development in R, Coursera Specialization (2 out of 5 courses completed)
Courses/Certificates:

  1. The R Programming Environment
  2. Advanced R Programming

08/2016 - 02/2017   Big Data, Coursera Specialization (5 out of 6 courses completed)
Courses/Certificates:

  1. Introduction to Big Data
  2. Big Data Modeling and Management Systems
  3. Big Data Integration and Processing
  4. Machine Learning With Big Data
  5. Graph Analytics for Big Data

03/2015 - 05/2015   Analytics Edge, MIT - edX course

02/2015 - 05/2015   Introduction to Probability - The Science of Uncertainty, MIT - edX course


Timeline